When I compile the current core-8-5-branch tcl:
http://core.tcl.tk/tcl/info/fc06c2939f
the resulting tclsh.exe
starts with the following error:
... invalid Side by Side configuration (orig German below (T1)).

In the system log there is written:
Wrong manifest: Row 9. The value ".0.0" of the "version"-Attribute in assemblyIdentity-Element is invalid.
(German original below (T2))